A phone rings at midnight, but the caller is unknown. The detective discovers it relates to a missing diamond. What did the call reveal?

Category: Mystery · Difficulty: expert

Hint: Consider why someone would call at this hour.

Answer

The caller was the thief, challenging the investigation.

Explanation

The timing suggests an intentional act meant to provoke fear or alert the victim about the theft.

This is a expert mystery riddle — one of the harder riddles here. The answer is The caller was the thief, challenging the investigation..

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